Ski development with Faction Skis: Product development and FE modelling of properties of alpine skis

When developing alpine skis, a lot of the work is based on previous knowledge and
what has been done in the past. This report presents an approach to create an FEmodel
in conjunction with Faction Skis. The model is representing an existing alpine
ski; the Faction Skis Candide 3.0, the model was developed with the intention of
simulating the bending stiffness as well as damping coefficients and eigenfrequencies.
After future improvement, the final goal of the model is to simulate new skis before
prototypes are built, for a more fact based development process than in the past.
In order to obtain a reliable result, the model is compared to physical testing. A
three point bending test and two different vibrations analyses were performed on a
physical Candide 3.0 and compared to the FE-model. The collected data was then
analyzed to determine the accuracy and predictive capabilities of the model.
A slightly deviant result of ca 7.2% is obtained when comparing the physical test
results of the bending stiffness to the FE model’s results. The deviant results are
likely to have arisen due to non accurate material models as well as issues while
establishing the thickness of each composite layer of the ski.
Two tests to determine the eigenfrequencies and the damping coefficients of the ski
were conducted. Both found the fundamental eigenfrequency of the ski, but due to
differences in the set up they differed somewhat, at 9 Hz and 9.75 Hz respectively.
Damping coefficients were also found but varied more. Due to a lack of material
damping data, damping was not implemented in the model but is a possibility for
the future.
Even though the model does not fully correlate with the data from the physical
test, it makes way for continued work. Future work is recommended to improve
the accuracy and add damping capabilities to the model via more accurate material
data. Adding breaking and shear strength prediction as well as delamination and
progressive damage theory would also be interesting to enable the development of
skis containing less conventional materials

BibTeX @misc{Borenius2018,author={Borenius, John and Edman, Henrik and Lindmark, Albin and Pålsson, Marcus},title={Ski development with Faction Skis: Product development and FE modelling of properties of alpine skis},abstract={When developing alpine skis, a lot of the work is based on previous knowledge and
what has been done in the past. This report presents an approach to create an FEmodel
in conjunction with Faction Skis. The model is representing an existing alpine
ski; the Faction Skis Candide 3.0, the model was developed with the intention of
simulating the bending stiffness as well as damping coefficients and eigenfrequencies.
After future improvement, the final goal of the model is to simulate new skis before
prototypes are built, for a more fact based development process than in the past.
In order to obtain a reliable result, the model is compared to physical testing. A
three point bending test and two different vibrations analyses were performed on a
physical Candide 3.0 and compared to the FE-model. The collected data was then
analyzed to determine the accuracy and predictive capabilities of the model.
A slightly deviant result of ca 7.2% is obtained when comparing the physical test
results of the bending stiffness to the FE model’s results. The deviant results are
likely to have arisen due to non accurate material models as well as issues while
establishing the thickness of each composite layer of the ski.
Two tests to determine the eigenfrequencies and the damping coefficients of the ski
were conducted. Both found the fundamental eigenfrequency of the ski, but due to
differences in the set up they differed somewhat, at 9 Hz and 9.75 Hz respectively.
Damping coefficients were also found but varied more. Due to a lack of material
damping data, damping was not implemented in the model but is a possibility for
the future.
Even though the model does not fully correlate with the data from the physical
test, it makes way for continued work. Future work is recommended to improve
the accuracy and add damping capabilities to the model via more accurate material
data. Adding breaking and shear strength prediction as well as delamination and
progressive damage theory would also be interesting to enable the development of
skis containing less conventional materials},publisher={Institutionen för industri- och materialvetenskap, Chalmers tekniska högskola},place={Göteborg},year={2018},keywords={alpine skis, finite element modelling, bending stiffness, eigenfrequency, damping coefficient, Chalmers Sport & Technology. ANSYS Mechanical, ANSYS Composite PrepPost, three point bending, modal analysis},note={100},}

RefWorks RT GenericSR ElectronicID 255476A1 Borenius, JohnA1 Edman, HenrikA1 Lindmark, AlbinA1 Pålsson, MarcusT1 Ski development with Faction Skis: Product development and FE modelling of properties of alpine skisYR 2018AB When developing alpine skis, a lot of the work is based on previous knowledge and
what has been done in the past. This report presents an approach to create an FEmodel
in conjunction with Faction Skis. The model is representing an existing alpine
ski; the Faction Skis Candide 3.0, the model was developed with the intention of
simulating the bending stiffness as well as damping coefficients and eigenfrequencies.
After future improvement, the final goal of the model is to simulate new skis before
prototypes are built, for a more fact based development process than in the past.
In order to obtain a reliable result, the model is compared to physical testing. A
three point bending test and two different vibrations analyses were performed on a
physical Candide 3.0 and compared to the FE-model. The collected data was then
analyzed to determine the accuracy and predictive capabilities of the model.
A slightly deviant result of ca 7.2% is obtained when comparing the physical test
results of the bending stiffness to the FE model’s results. The deviant results are
likely to have arisen due to non accurate material models as well as issues while
establishing the thickness of each composite layer of the ski.
Two tests to determine the eigenfrequencies and the damping coefficients of the ski
were conducted. Both found the fundamental eigenfrequency of the ski, but due to
differences in the set up they differed somewhat, at 9 Hz and 9.75 Hz respectively.
Damping coefficients were also found but varied more. Due to a lack of material
damping data, damping was not implemented in the model but is a possibility for
the future.
Even though the model does not fully correlate with the data from the physical
test, it makes way for continued work. Future work is recommended to improve
the accuracy and add damping capabilities to the model via more accurate material
data. Adding breaking and shear strength prediction as well as delamination and
progressive damage theory would also be interesting to enable the development of
skis containing less conventional materialsPB Institutionen för industri- och materialvetenskap, Chalmers tekniska högskola,PB Institutionen för industri- och materialvetenskap, Chalmers tekniska högskola,PB Institutionen för industri- och materialvetenskap, Chalmers tekniska högskola,PB Institutionen för industri- och materialvetenskap, Chalmers tekniska högskola,LA engLK http://publications.lib.chalmers.se/records/fulltext/255476/255476.pdfOL 30